-er b-u bbb bbc bbd bbe bbk bbm bbr bbu bcb bcc bcd bce bck bcm bcr bcu bdb bdc bdd bde bdk bdm bdr bdu be- beb bec bed bee bek bem ber beu bkb bkc bke bkk bkm bkr bmb bmc bmd bme bmk bmm bmr bmu brb brd bre brk brm brr bru bub buc bud bue buk bum bur buu c-- cbb cbc cbd cbe cbk cbm cbr cbu ccb ccc ccd cce cck ccm ccr ccu cdb cdc cdd cde cdk cdm cdr cdu ce- ceb cec ced cee cek cem cer ceu ckb ckc ckd ckm cmb cmc cmd cme cmk cmm cmr cmu crb crc crd cre crk crm crr cru cub cuc cud cue cuk cum cur cuu dbb dbc dbd dbe dbk dbm dbr dbu dcb dcc dcd dce dck dcm dcr dcu ddb ddc ddd dde ddk ddm ddr ddu de- deb dec ded dee dek dem der deu dkb dkc dke dkk dkm dkr dku dmb dmc dmd dme dmk dmm dmr dmu drb drc drd dre drk drm drr dru dub duc dud due duk dum dur ebb ebc ebd ebe ebk ebm ebr ebu ec- ecb ecc ecd ece eck ecm ecr ecu ed- edb edc edd ede edk edm edr edu eeb eec eed eee eek eem eer ekb ekc ekd eke ekr eku em- emb emc emd eme emk emm emr emu erb erc erd ere erk erm err eru eu- eub euc eud eue eur kbb kbc kbd kbe kbk kbm kbr kbu kcb kcc kcd kce kck kcm kcr kcu kdb kdc kde kdk kdm kdr kdu ke- keb kec ked kee kek kem ker kkb kkc kke kkk kkm kkr kku kmb kmc kmd kme kmk kmm kmu krc krd krk krr kru kub kuc kud kue kuk kum kur kuu m-r mbb mbc mbd mbe mbk mbm mbr mbu mc- mcb mcc mcd mce mck mcm mcr mcu mdb mdc mdd mde mdk mdm mdr mdu meb mec med mee mek mem mer meu mkb mkc mkd mke mkk mkm mkr mku mmb mmc mmd mme mmk mmm mmr mmu mrb mrc mrd mre mrk mrm mrr mru mub muc mud mue muk mum mur muu rbb rbc rbd rbe rbk rbm rbr rbu rcb rcc rcd rce rcm rcr rcu rdb rdc rdd rde rdm rdr rdu re- reb rec red ree rek rem rer reu rkb rkc rke rkk rkm rku rmb rmc rmd rme rmm rmr rrb rrc rrd rrk rrm rrr rru rub ruc rud rue ruk rum rur ruu ubb ubc ube ubk ubr ubu ucb ucc ucd uce uck ucm ucr ucu udb udc udd ude udk udm udr udu ueb uec ued uee uem uer ukb ukc uke ukk ukr uku um- umb umc umd ume umm umr umu ur- urb urc urd ure urk urm urr uru uuc uue uum uur uuu

bbbb bbcm bbdd bbeb bbrc bcbc bccc bccm bcde bcec bcer bcru bcuc bd-r bdbc bddc bdrm bebb bebe beck becu bede bedu beeb beed beek beem beer beke beme bemu berc berd bere berk berm berr beru beuk beur bmce bmdb brcb brce brdm breb brec bred bree brek brem brer brkb brmc brrm brrr bruc brud brue brum bubb bube bubu bucc buce buck bucu budb budd bude budu buem buer bueu buke bukk buku bum- bumb bur- burb burd bure burk burm burr buru c-cd cbbc cbcc cbce cbcm cbcr cbcu cbdb cbdc cbec cbee cber cbkm cbkr cbme cbrd cbre cbrm ccbc cccb cccc cccm cccu ccdc ccdm ccdr cced ccee cckm ccmb ccmc ccmd ccmm ccrc ccre ccuc cd-e cd-r cddb cddr cdec cder cdre cebu cec- cece cecm cedd cede cedu ceeb ceec ceem ceke cemb ceme cemm cemr cemu cer- cerc cerd cere ckbc ckbe ckck ckcm ckdm ckdu ckem cker ckrc ckrd ckrm cmbc cmcc cmdb cmdr cmec cmmb cmmc cmrr crbc crbu crcc crce crcr crdc cre- creb crec cred cree crem creu crkc crmb crub crud crue cruk crum cub- cubb cube cucc cuce cuck cucm cude cued cuek cuer cuk- cuke cum- cume curb curd cure curr dbcc dcbc dccb dccc dccu dcdb dcmu dcrk dddd ddrc ddre ddub debe debu dec- decc decd dece deck dedd dede dedu deeb deed deek deem deer dek- deke dem- demb demd deme demu der- derb derc dere derk derm derr deue deuk deum deur dkdc dmcc dmcm dmdc dmrb dmrc drbc dred dree drek drem drmk drub drue druk drum druu dub- dubb dubc dube dubu duce duck dudd dude dudu duer duke duku dumb dume dumm dure durk duru duur ebbc ebbr ebcc ebed eber ebru ebur ecbc ecbe eccb eccc ecce eccm ecdc eced ecem ecrc ecrm ecrr ecru eddc edde eddm ede- edem eder edme edrm edru educ edur eede eedu eeee eeke eerc ekeb eked ekek eker ekur embd embe embr emcc emek emer emeu emme emmu emre erbb erbe ercc erce erde ereb erec ered erem erer erke ermc erme errc erre erub eruc erum erur eubc eucd eude eudm euer eumc eur- eurc eure kbbb kbbc kbbd kbbe kbbk kbbm kbbr kbbu kbcb kbce kbck kbcr kbcu kbdb kbde kbdr kbeb kbec kbed kbee kbek kber kbkb kbkk kbkr kbmb kbmc kbme kbmr kbrb kbrc kbrd kbre kbrk kbru kbub kbuc kbud kbue kbuk kbur kbuu kcbc kcbd kcbk kcbr kcbu kccb kccc kccd kcck kccr kccu kcdc kcdd kcdr kcdu kceb kcec kced kcee kceu kckc kckk kckm kckr kcmb kcmc kcmd kcme kcmk kcmm kcmr kcrc kcrr kcru kcub kcue kcuk kdbb kdbm kdbr kdcc kdcd kdce kdcr kddb kddc kddd kddk kddr kdeb kdec kdem kdkb kdkd kdkk kdkr kdmc kdmd kdmr kdrb kdrm kdub kduc kdur kebb kebc kebe kebr kebu keck kecr kedb kedc kedd kede kedm kedr keed keek keem keer kekb kekc keke keku kemb kemc keme kemm kemr kemu ker- kerb kerc kere kerk kerm kerr keru keur